Hmm, there might be a way to rig those up to work.
But the car already has rubber ones on it, was just looking for something a bit stiffer to keep the catback moving a little as possible. It moves just a little too much now, and a flange is hitting a heat shield and it's a pretty annoying sound.
They look like this
I guess I could at always try just adding another rubber one to each point if two will fit on top of each other and see if that works.